Harvesting of microalgae (Chlorella sp.) from aquaculture bioflocs using an environmental-friendly chitosan-based bio-coagulant

被引：60

作者：

Yunos, Fareza Hanis Mohd ^{[1
]}

Nasir, Nurfarahana Mohd ^{[1
]}

Jusoh, Hajjar Hartini Wan ^{[1
]}

Khatoon, Helena ^{[2
,3
]}

Lam, Su Shiung ^{[1
,3
]}

Jusoh, Ahmad ^{[1
,3
]}

机构：

[1] Univ Malaysia Terengganu, Sch Ocean Engn, Terengganu 21030, Malaysia

[2] Univ Malaysia Terengganu, PPSPA, Sch Fisheries & Aquaculture Sci, Terengganu 21030, Malaysia

[3] Univ Malaysia Terengganu, Inst Trop Aquaculture, Terengganu 21030, Malaysia

来源：

INTERNATIONAL BIODETERIORATION & BIODEGRADATION | 2017年 / 124卷

关键词：

Microalgae; Aquaculture; Chitosan; Bioflocs; Coagulation; AFRICAN CATFISH; FLOCCULATION; IDENTIFICATION; VULGARIS;

D O I：

10.1016/j.ibiod.2017.07.016

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Aquaculture bioflocs is an agglomeration of organic matter and microorganisms in the aquaculture system. The bioflocs is capable of controlling water quality through absorption of undesirable nutrients in wastewater. It also contains microalgae such as Chlorella sp. that can be harvested for use in aqua culture applications. Nevertheless, the current harvesting technologies are based on chemicals or expensive membrane filtration. This study investigated the utilization of chitosan as a natural biocoagulant to harvest Chlorella sp. with an emphasis on the coagulation flocculation efficiency. The optimum dosage of chitosan at 30 mgri achieved 98% of microalgae removal efficiency and 80% of biomass recovery. The treated water was safe within a neutral pH level with less than 5 NTU of turbidity. The results show that chitosan can be an alternative and environmental-friendly bio-coagulant for microalgae harvesting. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：243 / 249

页数：7

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